ManTech International

Information Systems Security Engineer

ManTech International$90K — $120K *
Information Technology
5 - 7 years of experience
Job Overview by Ladders

Qualifications

  • Bachelor's degree in Computer Science or related field with 5+ years of experience, or equivalent experience with lesser formal education.
  • Strong experience in identifying and analyzing system requirements.
  • Proven track record in developing and maintaining system applications and security.
  • Familiarity with providing user support and guidance on security matters.
  • Skilled in recommending and implementing security upgrades and patches for existing systems.
  • Experience with DIACAP and RMF, specifically ACAS and DISA ACAS certification.
  • Familiarity with eMass and CE/OS certifications such as VMware, Linux, or Microsoft Windows 2022.

Responsibilities

  • Perform security assessments to identify vulnerabilities and recommend mitigations.
  • Validate and verify security requirements based on user and policy analysis.
  • Design and develop security system architectures for customer needs.
  • Implement security components for networking and multi-enclave environments.
  • Assist in developing security functionality across enterprise products and services.
  • Review and maintain documentation related to information security stipulations.
  • Enforce security compliance with government standards and the Risk Management Framework (RMF).

Benefits

  • Comprehensive health benefits including medical, dental, and vision coverage.
  • 401(k) retirement plan with company matching contributions.
  • Professional development opportunities and training programs.
  • Paid time off including vacation, sick leave, and holidays.
  • Employee referral program for introducing new talent.
Full Job Description
General information

Requisition #

R68720

Locations

USA-VA-Norfolk

Posting Date

06/16/2026

Security Clearance Required

Secret

Remote Type

Onsite

Time Type

Full time

Description & Requirements

MANTECH seeks a motivated, career and customer-oriented Information Systems Security Engineer (ISSE) to join our team onsite in Norfolk, Virginia supporting the Navy Continuous Training Environment (NCTE) Program. This is position is onsite.

Responsibilities include, but are not limited to:
  • Perform, support, or review security assessments to identify vulnerabilities or non-compliance and recommend activities to mitigate or eliminate identified threats.
  • Validate, and verify complex system-wide security requirements based on analysis of user, policy, regulatory, and resource demands.
  • Design, develop, and deploy security system architectures to meet evolving customer needs.
  • Design, develop, implement and/or integrate security components including for networking, computing, and multi-enclave environments.
  • Assist in the development and implementation of security functionality in varied products and services across the enterprise environment.
  • Review, provide feedback, and help update and maintain project and program documentation which contain IS stipulations, such as system security plans (SSP), certification and accreditation (C&A) packages, and other system design artifacts.
  • Enforce compliance with security authorization activities in accordance with Government standards and the RMF.


Minimum Qualifications:
  • Bachelor's degree in Computer Science or other related technical field and 5+ years of relevant information systems experience, or an Associates degree and 8+ years of relevant information systems experience, or a High School Diploma and eleven 11+ years of information systems relevant experience in lieu of Bachelors degree.
  • Experience identifying and analyzing systems requirements
  • Experience developing and maintaining system applications and security
  • Experience providing user support and guidance
  • Experience recommending and implementing security upgrades, security patches, and new applications vulnerabilities for installed equipment
  • Experience ensuring proper documentation, coordination, and maintenance of multiple systems
  • Experience of DIACAP and RMF are required as well as ACAS experience and DISA ACAS certification
  • Experience with eMass
  • Computing Environment/Operating System (CE/OS) certifications (Preferably VMware, Linux and/or Microsoft Windows 2022)


Preferred Qualifications:
  • Relevant work experience as an ISSE within a U.S. Government environment, DoD strongly preferred.
  • Active SEC+ CE certification.
  • Master's degree in computer science or related technical field.
  • Active Top Secret/Sensitive Compartmented Information (TS/SCI) security clearance.


Clearance Requirements:
  • US citizenship required an and active Secret security clearance


Physical Requirements:
  • Must be able to remain in a stationary position 50%
  • Constantly operates a computer and other office productivity machinery, such as a calculator, copy machine and computer printer.
  • The person in this position needs to occasionally move about inside the office to access file cabinets, office machinery, etc.


About ManTech International

ManTech International Corporation is an American defense contracting firm that was founded in 1968. The company provides cybersecurity, intelligence, and defense solutions to the United States Government. ManTech has over 9,000 employees and operates in 40 countries worldwide. The company's services include software development, systems engineering, and enterprise IT solutions. ManTech has been awarded numerous contracts by the U.S. Department of Defense and other government agencies.
Learn more about ManTech International
Size
9,800 employees
Market Cap
$3.7 billion
Industry
Net Income
$120.5 million
Founded
1968
5 Year Trend
+9.8%
Revenue
$2.5 billion
NASDAQ

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